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MAX9730EWP+TG45

P1-P3P4-P6P7-P9P10-P12
General Description
The MAX9730 features a mono Class G power amplifier
with an integrated inverting charge-pump power supply.
The charge pump can supply up to 500mA of peak out-
put current over a 2.7VDC to 5.5VDC supply voltage
range, guaranteeing up to 2.4W output power into an
8Ω load. The 2.4W output power allows for transient
audio content to remain unclipped as the battery rail col-
lapses over time.
The MAX9730 maximizes battery life by offering high-
performance efficiency. Maxim’s proprietary output
stage provides efficiency levels greater than Class AB
devices without the EMI penalties commonly associat-
ed with Class D amplifiers. High efficiency allows the
MAX9730 to be packaged in a WLP package without
derating the output power handling capability.
The device utilizes fully differential inputs and outputs,
comprehensive click-and-pop suppression, shutdown
control, and soft-start circuitry. The MAX9730 is fully
specified over the -40°C to +85°C extended tempera-
ture range and is available in ultra-small, lead-free,
20-bump WLP (2mm x 2.5mm) and 28-pin TQFN (4mm
x 4mm) packages.
Features
o 2.7V to 5.5V Operation
o Integrated Charge-Pump Power Supply
o 63% Efficiency (V
CC
= 5V, P
OUT
= 1W)
o 2.4W Output Power into 8Ω at V
CC
= 5V
o Clickless/Popless Operation
o Small Thermally Efficient Packages
2mm x 2.5mm 20-Bump WLP
4mm x 4mm 28-Pin TQFN
MAX9730
2.4W, Single-Supply, Class G Power Amplifier
________________________________________________________________
Maxim Integrated Products
1
PART PIN-PACKAGE TEMP RANGE
MAX9730EWP+TG45 20 WLP -40°C to +85°C
MAX9730ETI+ 28 TQFN-EP* -40°C to +85°C
Ordering Information
MAX9730
+
IN+
FB+
R
IN+
CPV
DD
2.7V TO 5.5V
R
IN-
C
IN
C
IN
IN-
FB-
OUT+
OUT-
-
CLASS G
OUTPUT
STAGE
CHARGE
PUMP
R
FB+
R
FB-
V
CC
CPGNDGND
Simplified Block Diagram
19-0701; Rev 5; 3/10
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
EVALUATION KIT
AVAILABLE
MP3 Players
Personal Media Players
Handheld Gaming
Consoles
Cell Phones
Smartphones
Notebook Computers
Applications
Typical Application Circuit/Functional Diagram and Pin
Configurations appear at end of data sheet.
+
Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
G45 indicates protective die coating.
*
EP = Exposed pad.
MAX9730
2.4W, Single-Supply, Class G Power Amplifier
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= V
CPVDD
= V
SHDN
= 3.6V, V
GND
= V
CPGND
= 0V, R
IN+
= R
IN-
= 10kΩ, R
FB+
= R
FB-
= 10kΩ, R
FS
= 100kΩ, C1 = 4.7µF, C2 =
10µF; speaker load resistors (R
L
) are terminated between OUT+ and OUT-, unless otherwise stated; T
A
= T
MIN
to T
MAX
, unless other-
wise noted. Typical values are at T
A
= +25°C.) (Notes 1, 2)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
(Voltages with respect to GND.)
V
CC
, CPV
DD
.............................................................-0.3V to +6V
PV
SS
, SV
SS
...............................................................-6V to +0.3V
CPGND..................................................................-0.3V to +0.3V
OUT+, OUT-...................................(SV
SS
- 0.3V) to (V
CC
+ 0.3V)
IN+, IN-, FB+, FB- ......................................-0.3V to (V
CC
+ 0.3V)
C1N..........................................(PV
SS
- 0.3V) to (CPGND + 0.3V)
C1P.......................................(CPGND - 0.3V) to (CPV
DD
+ 0.3V)
FS, SHDN ...................................................-0.3V to (V
CC
+ 0.3V)
Continuous Current Into/Out of
OUT+, OUT-, V
CC
, GND, SV
SS
.....................................800mA
CPV
DD
, CPGND, C1P, C1N, PV
SS
.................................800mA
Any Other Pin ..................................................................20mA
Continuous Power Dissipation (T
A
= +70°C)
20-Bump WLP (derate 10.3mW/°C above +70°C)........827mW
28-Pin TQFN (derate 20.8mW/°C above +70°C) ........1667mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) ................................+300°C
Bump Temperature (soldering) Reflow............................+260°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
GENERAL
Supply Voltage Range V
CC
Inferred from PSRR test 2.7 5.5 V
Quiescent Current I
CC
812mA
Chip Power Dissipation P
DISS
V
OUT
= 2.8V
RMS
, f = 1kHz, R
L
= 8Ω 0.9 W
Shutdown Current I
SHDN
SHDN = GND 0.3 5 µA
Turn-On Time t
ON
Time from shutdown or power-on to full
operation
50 ms
Input DC Bias Voltage V
BIAS
IN_ inputs 1.1 1.24 1.4 V
I
LOAD
= 0mA (slow mode) 55 83 110
Charge-Pump Oscillator
Frequency (Slow Mode)
f
OSC
I
LOAD
> 100mA (normal mode) 230 330 430
kHz
Maximum Capacitive Load C
L
200 pF
V
IH
1.4
SHDN Input Threshold (Note 3)
V
IL
0.4
V
SHDN Input Leakage Current ±1 µA
SPEAKER AMPLIFIER
T
A
= +25°C ±3 ±15
Output Offset Voltage V
OS
T
MIN
≤ T
A
≤ T
MAX
±20
mV
Common-Mode Rejection Ratio CMRR f
IN
= 1kHz (Note 4) 68 dB
Click-and-Pop Level V
CP
Peak voltage into/out of shutdown
A-weighted, 32 samples per second
(Notes 5, 6)
-52 dBV
MAX9730
2.4W, Single-Supply, Class G Power Amplifier
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= V
CPVDD
= V
SHDN
= 3.6V, V
GND
= V
CPGND
= 0V, R
IN+
= R
IN-
= 10kΩ, R
FB+
= R
FB-
= 10kΩ, R
FS
= 100kΩ, C1 = 4.7µF, C2 =
10µF; speaker load resistors (R
L
) are terminated between OUT+ and OUT-, unless otherwise stated; T
A
= T
MIN
to T
MAX
, unless other-
wise noted. Typical values are at T
A
= +25°C.) (Notes 1, 2)
Note 1: All devices are 100% production tested at room temperature. All temperature limits are guaranteed by design.
Note 2: Testing performed with resistive and inductive loads to simulate an actual speaker load. For dynamic speakers,
R
L
= 8Ω, 68µH.
Note 3: Designed for 1.8V logic.
Note 4: R
IN_
and R
FB_
have 0.5% tolerance.
Note 5: Amplifier inputs AC-coupled to GND.
Note 6: Testing performed at room temperature with 8Ω resistive load in series with 68µH inductive load connected across BTL
output for speaker amplifier. Mode transitions are controlled by SHDN. V
CP
is the peak output transient expressed in dBV.
Note 7: Voltage gain is defined as: [V
OUT+
- V
OUT-
] / [V
IN+
- V
IN-
].
Note 8: Mode A tone burst tested at full amplitude for one cycle and half amplitude for nine cycles. Mode B tone burst tested at
full amplitude for three cycles and half amplitude for seven cycles. Full amplitude is defined as 1% THD+N at full battery
(V
CC
= 4.2V).
Electrical Characteristics
table targets must be met at THD+N = 1% for one cycle (Mode A) and THD+N <
5% for three cycles (Mode B).
Note 9: Dynamic range is calculated by measuring the RMS voltage difference between a -60dBFS output signal and the noise
floor, then adding 60dB. Full scale is defined as the output signal needed to achieve 1% THD+N.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Voltage Gain A
V
(Notes 4, 7) 11.5 12 12.5 dB
V
CC
= 5V 2.4
V
CC
= 4.2V 1.67
V
CC
= 3.6V 1.25
Continuous Output Power P
OUT
THD+N = 1%, f = 1kHz,
R
L
= 8Ω
V
CC
= 3.0V 0.8
W
V
CC
= 5V 7.1
V
CC
= 4.2V 5.9
V
CC
= 3.6V 5.1
f = 1kHz, 1% THD+N,
Z
L
= 1µF + 10Ω
V
CC
= 3.0V 4.2
V
CC
= 5V 6.5
V
CC
= 4.2V 5.4
V
CC
= 3.6V 4.7
Output Voltage V
OUT
f = 10kHz, 1% THD+N,
Z
L
= 1µF + 10Ω
V
CC
= 3.0V 3.8
V
RMS
V
CC
= 2.7V to 5.5V 63 77
f = 217Hz, 200mV
P-P
ripple 77
f = 1kHz, 200mV
P-P
ripple 77
Power-Supply Rejection Ratio
(Note 4)
PSRR
f = 20kHz, 200mV
P-P
ripple 58
dB
R
L
= 8Ω, V
OUT
= 1kHz / 400mV
RMS
0.007
Total Harmonic Distortion Plus
Noise
THD+N
R
L
= 8Ω, V
OUT
= 1kHz / 1V
RMS
0.12
%
Signal-to-Noise Ratio SNR
V
OUT
= 0.5V
RMS
, inputs to GND by C1N,
A-weighted
95 dB
22Hz to 22kHz 96
Dynamic Range DR (Note 9)
A-weighted 99
dB
P1-P3P4-P6P7-P9P10-P12

MAX9730EWP+TG45

Mfr. #:
Buy MAX9730EWP+TG45
Manufacturer:
Maxim Integrated
Description:
Audio Amplifiers 2.4W Class G Power Amplifier
Lifecycle:
New from this manufacturer.
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